→ Additional heating
If any of the settings specified below have been selected, the system can switch on
the electric immersion heater during DHW heating (as long as the legionella function
has been enabled) when the compressor reaches the bounds of its operating
envelope and is consequently switched off.
Freezing protection only
The electric immersion heater will be switched on only when DHW tank temperature
falls below 5 °C (freezing protection). Once the temperature in the DHW tank
exceeds 10 °C, the immersion heater will be switched off.
● In freezing protection, space heating takes precedence over heating domestic
hot water.
●
If this option is selected, the electric immersion heater won’t be switched
on during a fault, unless the temperature falls below the Freezing
protection limit.
● The highest setpoint for domestic hot water is lower than the setpoints for the
operating modes in which the system can use the heater.
Backup use only
The electric immersion heater will be switched on, if:
1. The DHW tank temperature is below 5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
During backup operation, space heating takes precedence over heating domestic
hot water. The highest setpoint for domestic hot water is lower than the setpoints for
the operating modes in which the system can use the heater.
After compressor
The electric immersion heater will be switched on, if:
1. The DHW tank temperature is below 5 °C (freezing protection)
2. An alarm prevents the compressor from starting (backup operation)
3. The target temperature for the DHW tank is not reached, and the compressor is
switched off as it reaches the bounds of its operating envelope (there is a short
delay between switching off the compressor and switching on the heater).
Select this option, if the fuse for the heat pump power supply is not rated for running
the compressor and the immersion heater in parallel.
Mode for hot
water: operating
mode selection for
domestic hot water
heating
With compressor (parallel operation)
The electric immersion heater will be switched on, if:
1. The DHW tank temperature is below 5 °C (freezing protection),
2. An alarm prevents the compressor from starting (backup operation),
3. The target temperature for the DHW tank is not reached, and the compressor is
switched off as it reaches the bounds of its operating envelope (there is a short
delay between switching off the compressor and switching on the heater).
4. The target temperature for the DHW tank has not been reached, and the start
delay for the electric immersion heater has elapsed.
Select this option, if the fuse for the heat pump power supply is rated for running the
compressor and the immersion heater in parallel.
Heat source
Freezing protection
limit
The minimum permissible brine circuit temperature. If the temperature in the brine
circuit falls below this limit, the compressor will be switched off and the unit’s electric
immersion heater (if available) will provide the necessary heating. Once the circuit’s
temperature increases above the setpoint, the compressor will start again.
Heat source pump
Keeps running
You can set the brine pump to keep running continuously for a few days after
commissioning. The setpoint value is in days.
Manual control
The manual control function allows you to manually switch valve positions and, for example, turn on the
brine pump or condenser pump to facilitate bleeding the corresponding circuit. The function can also be
activated from the
Service
menu.
36 (54)
M8006 2123EN
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